* Introduce a new add-on pod NodeProblemDetector. ([#25986](https://github.com/kubernetes/kubernetes/pull/25986), [@Random-Liu](https://github.com/Random-Liu))
    * NodeProblemDetector is a DaemonSet running on each node, monitoring node health and reporting node problems as NodeCondition and Event. Currently it already supports kernel log monitoring, and will support more problem detection in the future. It is enabled by default on gce now.

pkg syscall (netbsd-arm64-cgo), const EAFNOSUPPORT = 47
pkg syscall (netbsd-arm64-cgo), const EAGAIN = 35
pkg syscall (netbsd-arm64-cgo), const EALREADY = 37
pkg syscall (netbsd-arm64-cgo), const EAUTH = 80
pkg syscall (netbsd-arm64-cgo), const EAUTH Errno
pkg syscall (netbsd-arm64-cgo), const EBADF = 9
pkg syscall (netbsd-arm64-cgo), const EBADMSG = 88
pkg syscall (netbsd-arm64-cgo), const EBADMSG Errno

pkg syscall (freebsd-386-cgo), const DT_SOCK ideal-int
pkg syscall (freebsd-386-cgo), const DT_UNKNOWN ideal-int
pkg syscall (freebsd-386-cgo), const DT_WHT ideal-int
pkg syscall (freebsd-386-cgo), const EAUTH Errno
pkg syscall (freebsd-386-cgo), const EBADMSG Errno
pkg syscall (freebsd-386-cgo), const EBADRPC Errno
pkg syscall (freebsd-386-cgo), const ECAPMODE Errno
pkg syscall (freebsd-386-cgo), const ECHO ideal-int

- Create HPA v2 from v2beta2 with some fields changed. (#102534, @wangyysde) [SIG API Machinery, Apps, Auth, Autoscaling and Testing]

pkg syscall (freebsd-arm64), const EAFNOSUPPORT = 47
pkg syscall (freebsd-arm64), const EAGAIN = 35
pkg syscall (freebsd-arm64), const EALREADY = 37
pkg syscall (freebsd-arm64), const EAUTH = 80
pkg syscall (freebsd-arm64), const EAUTH Errno
pkg syscall (freebsd-arm64), const EBADF = 9
pkg syscall (freebsd-arm64), const EBADMSG = 89
pkg syscall (freebsd-arm64), const EBADMSG Errno
pkg syscall (freebsd-arm64), const EBADRPC = 72

pkg syscall (darwin-arm64), const EAFNOSUPPORT = 47
pkg syscall (darwin-arm64), const EAGAIN = 35
pkg syscall (darwin-arm64), const EALREADY = 37
pkg syscall (darwin-arm64), const EAUTH = 80
pkg syscall (darwin-arm64), const EAUTH Errno
pkg syscall (darwin-arm64), const EBADARCH = 86
pkg syscall (darwin-arm64), const EBADARCH Errno
pkg syscall (darwin-arm64), const EBADEXEC = 85

* GCE/GKE load balancer health check default interval changes from 2 seconds to 8 seconds, unhealthyThreshold to 3. ([#70099](https://github.com/kubernetes/kubernetes/pull/70099), [@grayluck](https://github.com/grayluck))
    * Health check parameters are configurable to be bigger than default values.



# v1.11.4

pkg syscall (darwin-386), const EADDRNOTAVAIL = 49
pkg syscall (darwin-386), const EAFNOSUPPORT = 47
pkg syscall (darwin-386), const EAGAIN = 35
pkg syscall (darwin-386), const EALREADY = 37
pkg syscall (darwin-386), const EAUTH = 80
pkg syscall (darwin-386), const EBADARCH = 86
pkg syscall (darwin-386), const EBADEXEC = 85
pkg syscall (darwin-386), const EBADF = 9
pkg syscall (darwin-386), const EBADMACHO = 88

* Important Security-related changes before upgrading
  * You *MUST* set `--anonymous-auth=false` flag on your kube-apiserver unless you are a developer testing this feature and understand it.
  If you do not, you risk allowing unauthorized users to access your apiserver.
  * You *MUST* set `--anonymous-auth=false` flag on your federation apiserver unless you are a developer testing this feature and understand it.

- `/metrics/slis` is made available for control plane components allowing you to scrape health check metrics. ([#114997](https://github.com/kubernetes/kubernetes/pull/114997), [@Richabanker](https://github.com/Richabanker)) [SIG API Machinery, Apps, Architecture, Auth, Autoscaling, CLI, Cloud Provider, Cluster Lifecycle, Instrumentation, Network, Node, Release, Scheduling, Storage and Testing]

### Feature